Table 1. Search terms for each database.

Database	Search Terms
PubMed	("Maternal Death"[MeSH Terms] OR "Maternal Mortality"[MeSH Terms] OR "Maternal Health"[MeSH Terms]) AND ("Maternal Health Services"[MeSH Terms] OR "Prenatal Education"[MeSH Terms] OR "Health Education"[MeSH Terms] OR "Patient Education as Topic"[MeSH Terms] OR "Preventive Health Services"[MeSH Terms] OR "Teaching Materials"[MeSH Terms] OR "Primary Prevention"[MeSH Terms]) AND "United States"[MeSH Terms]
Embase	('maternal mortality'/exp OR 'maternal mortality' OR 'maternal death') AND ('maternal care' OR 'maternal health service' OR 'patient education' OR 'patient education material' OR 'health education' OR 'teaching' OR 'education' OR 'prevention') AND 'united states'